marked man, a
Also, marked woman. A person singled out as an object of suspicion, hostility, or vengeance. For example, As a witness to the robbery, he felt he was a marked man, or After her fiasco at the meeting, she was a marked woman—no one would hire her. This idiom was first recorded in 1833.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.